Question: When finding critical values, we sometimes need significance levels other than those available in Table A-3. Some computer programs approximate critical t values by wheredf

When finding critical values, we sometimes need significance levels other than those available in Table A-3. Some computer programs approximate critical t values by

wheredf = n - 1
e = 2.718

and z is the critical z score. Use this approximation to find the critical t score corresponding to n = 10 and a significance level of 0.05 in a right-tailed case. Compare the results to the critical t value found in Table A-3.

8 df3 df+ 1

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